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Old October 4th, 2020, 10:40 AM
George Bongert George Bongert is offline
Senior Member
Join Date: Jan 2013
Location: Oshkosh Wisconsin
Truck: Former owner Repowered by GMC 305 V-6, 1963 Chevy 30 Series SM420 Long Bed (9') Step/Fenderside
Posts: 171
Rep Power: 108
George Bongert will become famous soon enough
Default Re: Transmission identification

Greetings Onthefly!

Those numbers mean nothing to me. Does your Transmission have a shift lever on the top, or two short shift levers on the drivers side of the Transmission? Shift lever on top, you have an SM420 4 Speed Transmission. Two short shift levers on the side, you have an SM318 3 Speed Three On The Tree column shift Transmission.
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